“We have started an investigation into this rare incident and will take measures to prevent a recurrence,” Sharma said.

SBI is India’s largest bank with more than 50,000 ATMs spread across the country. Most ATMs in India have a closed-circuit camera installed for enhanced security.

But an inspection of the camera footage at the ATM in Tinsukia turned up no rat entering it, Sharma said. Of the 2.9 million rupees ($42,685) in the ATM, 1.7 million rupees ($25,022) were recovered intact.